View operand for creating a view of an expanse file

Abstract

A method for processing an operand by an operating system includes receiving, at the operating system, a set of interrupts from a view operand; wherein a first interrupt causes the operating system to create a postern, a second interrupt causes the operating system to delete a specified postern and the remaining interrupts are transformed into a user status that is placed in the operand. A non-transitory machine readable memory medium including instructions when executed to cause a processor to perform the following actions: receiving, at the operating system, a set of interrupts from a view operand; wherein a first interrupt causes the operating system to create a postern, a second interrupt causes the operating system to delete a specified postern and the remaining interrupts are transformed into a user status that is placed in the operand.

What is claimed is: 
     
         1 . A method of processing an operand by an operating system, the method comprising:
 receiving, at the operating system, a set of interrupts from a view operand;   wherein a first interrupt causes the operating system to create a postern, a second interrupt causes the operating system to delete a specified postern and the remaining interrupts are transformed into a user status that is placed in the operand.   
     
     
         2 . The method of  claim 1  wherein the view operand includes a space starting subset distance from the beginning of a data expanse file. 
     
     
         3 . The method of  claim 2 , wherein when the operating creates a postern, it creates a postern bank and returns an address of the bank to a database management system. 
     
     
         4 . The method of  claim 1 , wherein the view operand includes a number of words. 
     
     
         5 . The method of  claim 4 , wherein the number of words can be 2**60 words of virtual or physical space. 
     
     
         6 . The method of  claim 1 , wherein the view operand includes a postern upper limit. 
     
     
         7 . The method of  claim 7 , wherein the view operand includes a postern lower limit. 
     
     
         8 . The method of  claim 1 , wherein the postern can loaded to a base register. 
     
     
         9 . The method of  claim 1 , wherein the user status is placed into a word 7 of the view operand. 
     
     
         10 . A non-transitory machine readable memory medium including instructions when executed to cause a processor to perform the following actions:
 receiving, at the operating system, a set of interrupts from a view operand;   wherein a first interrupt causes the operating system to create a postern, a second interrupt causes the operating system to delete a specified postern and the remaining interrupts are transformed into a user status that is placed in the operand.   
     
     
         11 . The non-transitory machine readable memory medium of  claim 10  wherein the view operand includes a space starting subset distance from the beginning of a data expanse file. 
     
     
         12 . The non-transitory machine readable memory medium of  claim 11 , wherein when the operating creates a postern, it creates a postern bank and returns an address of the bank to a database management system. 
     
     
         13 . The non-transitory machine readable memory medium of  claim 11 , wherein the view operand includes a number of words. 
     
     
         14 . The non-transitory machine readable memory medium of  claim 13 , wherein the number of words can be 2**60 words of virtual or physical space. 
     
     
         15 . The non-transitory machine readable memory medium of  claim 10 , wherein the view operand includes a postern upper limit. 
     
     
         16 . The non-transitory machine readable memory medium of  claim 15 , wherein the view operand includes a postern lower limit. 
     
     
         17 . The non-transitory machine readable memory medium of  claim 10 , wherein the postern can loaded to a base register. 
     
     
         18 . The non-transitory machine readable memory medium of  claim 10 , wherein the user status is placed into a word 7 of the view operand.